Optimization of Fenton combined with membrane bioreactor in the treatment of printing and dyeing wastewater

IF 4.1 2区环境科学与生态学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

International Biodeterioration & Biodegradation Pub Date : 2024-10-26 DOI:10.1016/j.ibiod.2024.105945

Haibo Xu , Han Zhang , Jincan Huang , Lu Zhang , Feng Wang , Guangbing Liu , Xuemin Yu , Weijing Liu , Chunkai Huang

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Abstract

Effects of influent adsorbable organic halogens (AOX) and ammonia concentrations, hydraulic retention time (HRT) on the microbial community composition, functional genes abundance of anoxic/aerobic-membrane bioreactor (A/O–MBR) and its ability to treat raw and Fenton oxidized printing and dyeing wastewater (PDW) were evaluated. Fenton combined with A/O–MBR exhibited better treatment performance on chemical oxygen demand (COD) and AOX removal for PDW remediation. After six months’ optimization, at phase VII (50 mg/L AOX, 50 mg/L NH₄⁺–N, and HRT = 72h), 81.8 % of the COD and 94.6% of the AOX were removed in raw PDW A/O–MBR, and 92.0% of the COD and 100% of the AOX were removed in Fenton oxidized PDW A/O–MBR. An increase in ammonia level is conducive to the COD and AOX removal, whereas shortening the HRT in the A/O–MBR systems can drastically lower the COD and AOX removal efficiency. The metagenomics analysis indicates that an increase in AOX loading facilitates the accumulation of 2,4,6–TCP and 4–CP metabolism relevant genes, while significantly reduces the transcript per million (TPM) abundance of nitrogen removal functional genes. However, higher ammonia loading and shorter HRT promote the accumulation of AOX and nitrogen removal functional genes.

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Fenton 与膜生物反应器相结合处理印染废水的优化方案

评估了进水可吸附有机卤素（AOX）和氨浓度、水力停留时间（HRT）对缺氧/好氧膜生物反应器（A/O-MBR）的微生物群落组成、功能基因丰度的影响及其处理原水和芬顿氧化印染废水（PDW）的能力。Fenton 与 A/O-MBR 的结合在修复印染废水的化学需氧量（COD）和 AOX 去除方面表现出更好的处理性能。经过六个月的优化，在第七阶段（50 mg/L AOX、50 mg/L NH4+-N、HRT = 72 小时），原 PDW A/O-MBR 去除了 81.8% 的 COD 和 94.6% 的 AOX，而 Fenton 氧化 PDW A/O-MBR 去除了 92.0% 的 COD 和 100% 的 AOX。氨氮水平的增加有利于 COD 和 AOX 的去除，而缩短 A/O-MBR 系统的 HRT 则会大幅降低 COD 和 AOX 的去除效率。元基因组学分析表明，AOX 负荷的增加会促进 2,4,6-TCP 和 4-CP 代谢相关基因的积累，同时显著降低脱氮功能基因的百万转录本（TPM）丰度。然而，较高的氨负荷和较短的 HRT 会促进 AOX 和脱氮功能基因的积累。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Biodeterioration & Biodegradation 生物-环境科学

CiteScore

9.60

自引率

10.40%

发文量

107

审稿时长

21 days

期刊介绍： International Biodeterioration and Biodegradation publishes original research papers and reviews on the biological causes of deterioration or degradation.